:root{
  --red:#c8102e;
  --red-600:#a00d24;
  --ink:#14161a;
  --ink-2:#1d2026;
  --paper:#ffffff;
  --smoke:#f4f5f7;
  --muted:#66707c;
  --line:#e6e8ec;
  --radius:10px;
  --max:1140px;
  --shadow:0 10px 30px rgba(20,22,26,.08);
}
*{margin:0;padding:0;box-sizing:border-box}
[hidden]{display:none!important}
html{scroll-behavior:smooth}
body{font-family:"Segoe UI","Microsoft YaHei UI","Microsoft YaHei","PingFang SC",system-ui,sans-serif;color:#22262e;line-height:1.7;background:var(--paper);font-kerning:normal;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block;-webkit-user-drag:none;-webkit-touch-callout:none;user-select:none;-webkit-user-select:none;-ms-user-select:none}
h1,h2,h3{text-wrap:balance;word-break:normal;overflow-wrap:break-word}
p,li{text-wrap:pretty}
[id]{scroll-margin-top:96px}
.container{max-width:var(--max);margin:0 auto;padding:0 22px}
:focus-visible{outline:3px solid rgba(200,16,46,.34);outline-offset:3px}
.skip-link{position:fixed;left:16px;top:-80px;z-index:1000;padding:10px 16px;border-radius:6px;background:var(--ink);color:#fff;font-weight:700;transition:top .16s}
.skip-link:focus{top:12px}
main:focus{outline:none}

/* 顶部工具条 */
.topbar{background:var(--ink);color:#cdd2d9;font-size:13px}
.topbar .container{display:flex;justify-content:space-between;align-items:center;height:38px;gap:16px}
.topbar a{color:#cdd2d9}
.topbar a:hover{color:#fff}
.topbar .tb-right{display:flex;gap:18px}
.phone-wechat{margin-left:4px;color:inherit;font:inherit;font-weight:inherit;letter-spacing:inherit;line-height:inherit;white-space:nowrap}

/* 导航 */
.site-header{position:sticky;top:0;z-index:50;background:#fff;border-bottom:1px solid var(--line)}
.site-header .container{display:flex;align-items:center;justify-content:space-between;height:72px}
.brand{display:flex;align-items:center;gap:12px}
.brand .logo{width:46px;height:46px;object-fit:contain;display:block;flex:none}
.brand .name{font-size:19px;font-weight:800;letter-spacing:0;color:var(--ink)}
.brand .sub{display:block;font-size:11px;font-weight:600;color:#5d6672;letter-spacing:.7px}
.site-nav{display:flex;gap:30px;align-items:center}
.site-nav{margin-left:auto}
.site-nav a{font-size:15px;font-weight:600;color:#33383f;position:relative;padding:6px 0}
.site-nav a:hover,.site-nav a.active{color:var(--red)}
.site-nav a.active::after{content:"";position:absolute;left:0;right:0;bottom:-4px;height:2px;background:var(--red)}
.nav-cta{display:inline-flex;align-items:center;gap:8px;background:var(--red);color:#fff!important;font-weight:700;padding:10px 18px!important;border-radius:6px;transition:background-color .18s,box-shadow .18s}
.nav-cta:hover{background:var(--red-600)}
.nav-cta:active{background:#870b1e}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;width:34px;height:34px}
.nav-toggle span{display:block;height:2px;background:var(--ink);margin:6px 0;transition:.2s}

/* 中英文切换 */
.lang-toggle{appearance:none;flex:none;margin-left:18px;padding:6px 14px;border:1px solid var(--line);border-radius:20px;background:#fff;color:var(--ink);font-size:13px;font-weight:700;letter-spacing:.4px;line-height:1.5;white-space:nowrap;cursor:pointer;transition:.2s}
.lang-toggle:hover{border-color:var(--red);color:var(--red)}
.phone-sep{color:var(--muted);margin:0 3px}

/* 首屏 */
.hero{background:
  linear-gradient(rgba(14,16,20,.95),rgba(20,23,28,.97)),
  repeating-linear-gradient(-45deg,rgba(200,16,46,.14) 0 16px,transparent 16px 32px),
  linear-gradient(135deg,#14161a,#22262e);
  color:#fff;padding:72px 0 66px}
.hero .container{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:12px;font-weight:700;letter-spacing:.8px;color:#ff6b81;text-transform:uppercase}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--red)}
.hero h1{font-size:clamp(34px,4.5vw,56px);line-height:1.13;font-weight:800;margin:18px 0;letter-spacing:0;text-wrap:balance}
.hero h1 .hl{color:#ff4d63}
.hero .lead{font-size:18px;color:#cbd1d9;max-width:540px;line-height:1.75;text-wrap:pretty}
.actions{display:flex;gap:14px;flex-wrap:wrap}
.hero .actions{margin-top:30px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:700;font-size:15px;padding:13px 24px;border-radius:6px;border:1px solid transparent;cursor:pointer;transition:background-color .18s,border-color .18s,color .18s,box-shadow .18s}
.btn-primary{background:var(--red);color:#fff;box-shadow:0 9px 24px rgba(200,16,46,.22)}
.btn-primary:hover{background:var(--red-600)}
.btn-primary:active{background:#870b1e}
.btn-ghost{border-color:rgba(255,255,255,.35);color:#fff;background:rgba(255,255,255,.025)}
.btn-ghost:hover{border-color:rgba(255,255,255,.78);background:rgba(255,255,255,.07)}
.hero .trust{display:flex;gap:26px;margin-top:34px;flex-wrap:wrap}
.hero .trust div{font-size:14px;color:#9aa3af}
.hero .trust b{display:block;font-size:22px;color:#fff;font-weight:800}

/* 图片占位 */
.img-slot{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;text-align:center;color:#8a93a0;border:1px dashed #c3c9d2;border-radius:var(--radius);background:repeating-linear-gradient(45deg,#f2f4f6 0 12px,#f8f9fb 12px 24px);min-height:200px;padding:20px}
.img-slot svg{width:34px;height:34px;opacity:.55}
.img-slot .tag{font-size:13px}
.img-slot .note{font-size:11px;opacity:.75}
.hero .img-slot{min-height:360px;border-color:rgba(255,255,255,.18);background:repeating-linear-gradient(45deg,rgba(255,255,255,.04) 0 14px,transparent 14px 28px);color:#8b93a0}

/* 区块通用 */
.section{padding:72px 0}
.section.smoke{background:var(--smoke)}
.section-head{max-width:700px;margin-bottom:42px}
.section-head .eyebrow{color:var(--red)}
.section-head .eyebrow::before{background:var(--red)}
.section-head h2{font-size:clamp(25px,3vw,36px);font-weight:800;color:var(--ink);margin:12px 0 10px;letter-spacing:0;line-height:1.25;text-wrap:balance}
.section-head p{color:var(--muted);font-size:16px;line-height:1.75;text-wrap:pretty}

/* 优势 */
.adv-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.adv-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 22px;transition:border-color .18s,box-shadow .18s}
.adv-card:hover{box-shadow:var(--shadow);border-color:#e3aeb8}
.adv-card .ic{width:46px;height:46px;border-radius:8px;background:#fbeef0;color:var(--red);display:flex;align-items:center;justify-content:center;margin-bottom:16px}
.adv-card h3{font-size:17px;font-weight:800;margin-bottom:8px;color:var(--ink)}
.adv-card p{font-size:14px;color:var(--muted)}

/* 产品 */
.prod-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.prod-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column;transition:border-color .18s,box-shadow .18s}
.prod-card:hover{box-shadow:var(--shadow);border-color:#e3aeb8}
.prod-card .img-slot{border-radius:0;border-left:0;border-right:0;border-top:0}
.prod-photo{width:100%;aspect-ratio:16/10;background-size:cover;background-position:center;display:block;background-color:#fff}
.prod-card .body{padding:22px;display:flex;flex-direction:column;gap:10px;flex:1}
.prod-card .flag{display:inline-block;align-self:flex-start;font-size:12px;font-weight:700;color:#fff;background:var(--red);padding:3px 10px;border-radius:20px}
.prod-card h3{font-size:18px;font-weight:800;color:var(--ink)}
.prod-card p{font-size:14px;color:var(--muted);flex:1}
.prod-card .more{font-weight:700;color:var(--red);font-size:14px}
.prod-card.featured{border:2px solid var(--red)}
.cat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;align-items:stretch}
.cat-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px 24px 18px;transition:transform .2s,box-shadow .2s,border-color .2s}
.cat-card:hover{box-shadow:0 12px 30px rgba(24,32,43,.10);border-color:#d9c2c6}
.cat-card h3{font-size:19px;font-weight:800;color:var(--ink);margin-bottom:14px;padding-bottom:12px;border-bottom:2px solid var(--red)}
.cat-card ul{list-style:none;margin:0}
.cat-card li{margin-bottom:12px;font-size:14px;color:#4b525c;line-height:1.65}
.cat-card li b{color:var(--ink)}
.cat-card .more{display:inline-block;margin-top:6px;font-weight:700;color:var(--red);font-size:14px}
.cat-card .img-slot{min-height:160px;margin:16px 0}
.sub-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.sub-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column}
.sub-card .img-slot{border-radius:0;border-left:0;border-right:0;border-top:0;min-height:200px}
.sub-card .body{padding:20px 22px;flex:1}
.sub-card h3{font-size:17px;font-weight:800;color:var(--ink);margin-bottom:8px}
.sub-card p{font-size:14px;color:var(--muted)}
.tree-breadcrumb{font-size:13px;color:var(--muted);margin-bottom:22px}
.tree-breadcrumb a{color:var(--red);font-weight:600}
.tree-breadcrumb span{color:#9aa1aa}
.cat-layout{display:grid;grid-template-columns:250px 1fr;gap:30px;align-items:start}
.cat-side{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:16px 0;position:sticky;top:88px}
.cat-side h4{padding:0 18px 12px;font-size:14px;font-weight:800;color:var(--ink);border-bottom:1px solid var(--line);margin-bottom:6px}
.tree{list-style:none;margin:0;padding:0}
.tree>li>a{display:block;padding:9px 18px;font-size:14px;font-weight:600;color:#343a42;border-left:3px solid transparent;transition:.15s}
.tree>li>a:hover{color:var(--red);background:#f7f8fa}
.tree>li>a.active{color:var(--red);background:#fbeef0;border-left-color:var(--red)}
.tree-sub{list-style:none;margin:0;padding:0 0 10px}
.tree-sub li{padding:5px 18px 5px 38px;font-size:13px;position:relative}
.tree-sub li a{color:#7a828c;text-decoration:none;transition:.15s}
.tree-sub li a:hover{color:var(--red)}
.tree-sub li::before{content:"";position:absolute;left:25px;top:11px;width:5px;height:5px;border-radius:50%;background:#c9cfd6}
.cat-main .sub-grid{grid-template-columns:repeat(2,1fr)}

/* 应用领域 */
.app-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.app-card{background:var(--ink);color:#e7eaee;border-radius:var(--radius);overflow:hidden}
.app-card .img-slot{border-radius:0;border:0;border-bottom:1px solid rgba(255,255,255,.08);background:repeating-linear-gradient(45deg,rgba(255,255,255,.04) 0 14px,transparent 14px 28px)}
.app-card .body{padding:26px}
.app-card h3{color:#fff;font-size:20px;font-weight:800;margin-bottom:10px}
.app-card h3 .ic{color:var(--red)}
.app-card p{font-size:14px;color:#b9c0ca}

/* 关于我们 */
.about-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:46px;align-items:center}
.about-grid h2{font-size:clamp(26px,3vw,34px);font-weight:800;color:var(--ink);margin-bottom:16px;letter-spacing:0}
.about-grid p{color:#4b525c;margin-bottom:12px}
.about-grid .facts{display:flex;gap:24px;margin-top:22px;flex-wrap:wrap}
.about-grid .facts div b{display:block;font-size:24px;color:var(--red);font-weight:800}
.about-grid .facts div span{font-size:13px;color:var(--muted)}

/* CTA */
.cta{background:linear-gradient(120deg,var(--red),var(--red-600));color:#fff;padding:56px 0}
.cta .container{display:flex;align-items:center;justify-content:space-between;gap:30px;flex-wrap:wrap}
.cta h2{font-size:clamp(23px,3vw,31px);font-weight:800;margin-bottom:8px;letter-spacing:0}
.cta p{color:#ffe0e5}
.cta .btn{background:#fff;color:var(--red);font-weight:800;box-shadow:none}
.cta .btn:hover{background:#fbeef0}

/* 页脚 */
.site-footer{background:var(--ink);color:#aab2bd;font-size:14px;padding:54px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1.4fr;gap:36px;padding-bottom:34px;border-bottom:1px solid #2a2e35}
.site-footer h4{color:#fff;font-size:15px;font-weight:700;margin-bottom:16px}
.site-footer .brand .name{color:#fff}
.site-footer .brand .sub{color:#88909c}
.site-footer p{color:#98a1ac}
.footer-links{list-style:none}
.footer-links li{margin-bottom:10px}
.footer-links a:hover{color:#fff}
.footer-contact li{list-style:none;margin-bottom:10px;display:flex;gap:10px}
.footer-contact b{color:#e7eaee;font-weight:600}
.copyright{text-align:center;color:#7a828e;padding-top:24px;font-size:13px}
.copyright a{color:inherit;text-decoration:none}
.copyright a:hover{text-decoration:underline}

@media(max-width:960px){
  .hero .container{grid-template-columns:1fr}
  .adv-grid{grid-template-columns:repeat(2,1fr)}
  .prod-grid{grid-template-columns:repeat(2,1fr)}
  .cat-grid{grid-template-columns:repeat(2,1fr)}
  .sub-grid{grid-template-columns:repeat(2,1fr)}
  .cat-layout{grid-template-columns:1fr}
  .cat-side{position:static}
  .app-grid{grid-template-columns:1fr}
  .about-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .nav-toggle{display:block}
  .lang-toggle{margin-left:auto;margin-right:6px}
  .site-nav{position:absolute;top:72px;left:0;right:0;background:#fff;flex-direction:column;align-items:flex-start;gap:0;padding:8px 22px 20px;border-bottom:1px solid var(--line);display:none}
  .site-nav.open{display:flex}
  .site-nav a{padding:12px 0;width:100%;border-bottom:1px solid var(--line)}
  .site-nav .nav-cta{border-bottom:0;margin-top:8px}
}
@media(max-width:560px){
  .adv-grid{grid-template-columns:1fr}
  .prod-grid{grid-template-columns:1fr}
  .cat-grid{grid-template-columns:1fr}
  .sub-grid{grid-template-columns:1fr}
  .topbar .tb-right{display:none}
}

/* 内页顶部 */
.page-hero{background:linear-gradient(rgba(14,16,20,.94),rgba(20,23,28,.97)),repeating-linear-gradient(-45deg,rgba(200,16,46,.12) 0 16px,transparent 16px 32px);color:#fff;padding:54px 0;border-bottom:4px solid var(--red)}
.page-hero .crumb{font-size:13px;color:#ff6b81;font-weight:700;letter-spacing:1.2px;text-transform:uppercase}
.page-hero h1{font-size:clamp(28px,4vw,42px);font-weight:800;margin:10px 0;letter-spacing:0;line-height:1.25;text-wrap:balance}
.page-hero p{color:#b9c0ca;font-size:15px;max-width:680px}

/* 正文 */
.prose{max-width:860px}
.prose h2{font-size:23px;font-weight:800;color:var(--ink);margin:34px 0 14px}
.prose p{color:#4b525c;margin-bottom:14px}
.prose ul{list-style:none;margin:10px 0 20px}
.prose ul li{padding-left:22px;position:relative;margin-bottom:10px;color:#4b525c}
.prose ul li::before{content:"";position:absolute;left:0;top:.58em;width:8px;height:8px;background:var(--red);border-radius:2px}

/* 产品详情 */
.detail-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:42px;align-items:start}
.detail-grid .img-slot{min-height:320px}
.detail-photo{width:100%;aspect-ratio:4/3;background-size:cover;background-position:center;border-radius:var(--radius);display:block;background-color:#fff;border:1px solid var(--line)}
.gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:20px}
.gallery figure{margin:0}
.gallery .gallery-ph{width:100%;aspect-ratio:16/10;background-size:cover;background-position:center;background-color:#fff;border-radius:8px;border:1px solid var(--line);display:block}
.gallery figcaption{font-size:12px;color:var(--muted);margin-top:6px;text-align:center}
.spec-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin:18px 0}
.spec-item{background:#fff;border:1px solid var(--line);border-radius:8px;padding:14px 16px}
.spec-item b{display:block;font-size:13px;color:var(--muted);font-weight:600;margin-bottom:4px}
.spec-item span{font-size:15px;font-weight:700;color:var(--ink)}

/* FAQ */
.faq-item{border:1px solid var(--line);border-radius:8px;margin-bottom:12px;background:#fff;overflow:hidden}
.faq-item summary{cursor:pointer;padding:16px 20px;font-weight:700;color:var(--ink);list-style:none;display:flex;justify-content:space-between;align-items:center;gap:12px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";font-size:20px;color:var(--red);flex:none}
.faq-item[open] summary::after{content:"–"}
.faq-item p{padding:0 20px 16px;color:var(--muted);font-size:14px}

/* 联系卡片 + 表单 */
.contact-cards{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-bottom:32px}
.contact-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.contact-card .ic{width:44px;height:44px;border-radius:8px;background:#fbeef0;color:var(--red);display:flex;align-items:center;justify-content:center;margin-bottom:14px}
.contact-card h3{font-size:16px;font-weight:800;margin-bottom:6px;color:var(--ink)}
.contact-card p{font-size:14px;color:var(--muted)}
.contact-card a{color:var(--red);font-weight:700}
.contact-card [data-phones] .phone-wechat{color:var(--red);font-weight:700}
.form{background:linear-gradient(180deg,#fff 0,#fff 72%,#fafbfc 100%);border:1px solid var(--line);border-radius:14px;padding:30px;box-shadow:0 14px 36px rgba(20,22,26,.07)}
.form .row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form label{display:block;font-size:13px;font-weight:700;color:var(--ink);margin-bottom:7px}
.form input,.form textarea{width:100%;border:1px solid var(--line);border-radius:8px;padding:12px 13px;font-size:15px;font-family:inherit;color:var(--ink);background:#fff;transition:border-color .16s,box-shadow .16s,background .16s}
.form input:hover,.form textarea:hover{border-color:#cbd0d7}
.form input:focus,.form textarea:focus{outline:none;border-color:var(--red);box-shadow:0 0 0 3px rgba(200,16,46,.11)}
.form input[aria-invalid="true"],.form textarea[aria-invalid="true"]{border-color:#b42318;background:#fffafa}
.form .field{margin-bottom:16px}
.form textarea{min-height:132px;resize:vertical}
.field-error{display:block;min-height:18px;margin-top:5px;color:#b42318;font-size:12px;line-height:1.45}
.hp-field{position:absolute!important;left:-10000px!important;width:1px!important;height:1px!important;overflow:hidden!important}
.consent-row{display:flex!important;align-items:flex-start;gap:10px;margin:2px 0 18px;color:#4b5563!important;font-size:13px!important;font-weight:500!important;line-height:1.55;cursor:pointer}
.consent-row input[type=checkbox]{flex:none;width:18px!important;height:18px;margin:2px 0 0;padding:0!important;accent-color:var(--red)}
.form-channels{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:0 0 18px;padding:12px;border:1px solid #edf0f3;border-radius:10px;background:#f8f9fb}
.form-channels span{display:flex;flex-direction:column;gap:1px;padding:2px 7px;border-right:1px solid #e5e8ed}
.form-channels span:last-child{border-right:0}
.form-channels b{font-size:13px;color:var(--ink)}
.form-channels small{font-size:12px;color:var(--muted);line-height:1.45}
.form-submit{min-width:150px;position:relative}
.form-submit:disabled{opacity:.72;cursor:wait}
.btn-spinner{display:none;width:15px;height:15px;border:2px solid rgba(255,255,255,.45);border-top-color:#fff;border-radius:50%;animation:spin .7s linear infinite}
.form-submit:disabled .btn-spinner{display:inline-block}
@keyframes spin{to{transform:rotate(360deg)}}
.form .hint{font-size:12px;color:var(--muted);margin-top:10px}
.form-result{display:flex;align-items:flex-start;gap:12px;padding:15px 16px;border-radius:10px;margin-top:16px;font-size:14px;line-height:1.55}
.form-result.success{background:#f0fbf4;border:1px solid #b7e4c7;color:#14532d}
.form-result.error{background:#fff5f5;border:1px solid #f1b8b8;color:#8a1c1c;font-weight:600}
.result-mark{display:inline-flex;align-items:center;justify-content:center;flex:none;width:26px;height:26px;border-radius:50%;background:#16784a;color:#fff;font-weight:800}
.form-result.error .result-mark{display:none}
.form-result strong{display:block;font-size:15px;margin-bottom:2px;color:inherit}
.form-result p{color:inherit;margin:0}
.form-result small{display:block;margin-top:7px;color:#527063;font-size:11px;overflow-wrap:anywhere}
.result-channels{display:flex;flex-wrap:wrap;gap:6px;margin-top:9px}
.result-channel{display:inline-flex;padding:3px 8px;border-radius:999px;font-size:11px;font-weight:700}
.result-channel.ok{background:#dff5e7;color:#17603b}
.result-channel.pending{background:#fff3d6;color:#7a4e00}

@media(max-width:720px){
  .spec-grid{grid-template-columns:1fr}
  .contact-cards{grid-template-columns:1fr}
  .form .row{grid-template-columns:1fr}
  .form{padding:22px 18px}
  .form-channels{grid-template-columns:1fr;padding:5px 12px}
  .form-channels span{border-right:0;border-bottom:1px solid #e5e8ed;padding:9px 0}
  .form-channels span:last-child{border-bottom:0}
  .form-submit{width:100%}
  .detail-grid{grid-template-columns:1fr}
  .gallery{grid-template-columns:repeat(2,1fr)}
}

@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
}

/* 实拍图 */
.hero-photo{width:100%;height:100%;min-height:360px;background:linear-gradient(145deg,#252a31,#15181d);background-size:cover;background-position:center;border:1px solid rgba(255,255,255,.14);border-radius:14px;display:block;box-shadow:0 26px 65px rgba(0,0,0,.33)}
.app-photo{width:100%;aspect-ratio:16/9;background-size:cover;background-position:center;display:block}
.about-photo{width:100%;height:100%;min-height:280px;background:linear-gradient(145deg,#f4f6f8,#e9edf1);background-size:cover;background-position:center;border:1px solid var(--line);border-radius:var(--radius);display:block}

/* 内容后台填充图片：占位槽一旦有图，就按照片样式展示 */
.img-slot.has-img{background:#fff;background-size:cover;background-position:center;border:1px solid var(--line);border-radius:var(--radius)}

/* 同一图位有多张照片时：左右点击滚动的轮播 */
.carousel{position:relative;overflow:hidden;padding:0;display:block}
.carousel .car-track{position:absolute;inset:0}
.carousel .car-slide{position:absolute;inset:0;background-size:contain;background-repeat:no-repeat;background-position:center;background-color:#fff;opacity:0;transition:opacity .35s ease}
.carousel .car-slide.on{opacity:1}
.carousel .car-btn{position:absolute;top:50%;transform:translateY(-50%);width:34px;height:34px;padding:0;border:1px solid rgba(255,255,255,.45);border-radius:50%;background:rgba(15,26,38,.55);color:#fff;font-size:20px;line-height:1;cursor:pointer;z-index:3;opacity:.9;box-shadow:0 1px 6px rgba(0,0,0,.25);transition:background .2s,opacity .2s}
.carousel .car-btn:hover{background:var(--red);opacity:1}
.carousel .car-prev{left:10px}
.carousel .car-next{right:10px}
.carousel .car-dots{position:absolute;left:0;right:0;bottom:9px;display:flex;justify-content:center;gap:6px;z-index:3}
.carousel .car-dots button{appearance:none;width:10px;height:10px;min-width:10px;padding:0;border:0;border-radius:50%;background:rgba(24,32,43,.42);box-shadow:0 0 0 2px rgba(255,255,255,.72),0 1px 2px rgba(0,0,0,.3);cursor:pointer;transition:background .2s,transform .2s}
.carousel .car-dots button:hover{transform:scale(1.2)}
.carousel .car-dots button.on{background:var(--red);box-shadow:0 0 0 2px rgba(255,255,255,.9),0 1px 2px rgba(0,0,0,.3)}

/* 产品图一律完整显示：等比缩放 + 白底留边，不裁切主体 */
.img-slot.has-img,
.prod-photo,
.detail-photo,
.gallery .gallery-ph{background-size:contain;background-repeat:no-repeat;background-position:center;background-color:#fff}

/* 内容图片使用原生 img：支持懒加载、异步解码和搜索图片索引 */
.has-img{position:relative}
.content-image{position:absolute;inset:0;width:100%;height:100%;display:block;object-fit:contain;object-position:center;background:#fff}
.hero-photo .content-image,.app-photo .content-image,.about-photo .content-image{object-fit:cover}
.img-load-error{background:#f4f5f7}
.img-load-error::after{content:"图片暂时无法加载";position:absolute;inset:0;display:flex;align-items:center;justify-content:center;padding:20px;color:var(--muted);font-size:13px;text-align:center;pointer-events:none}
.carousel.img-load-error::after{z-index:2;background:rgba(255,255,255,.88)}
@supports(content:"x"/"y"){
  .img-load-error::after{content:"图片暂时无法加载"/""}
}
html[lang="en"] .img-load-error::after{content:"Image unavailable"}